Balance held at close of period in number of shares.

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Name:	us-gaap_InvestmentOwnedBalanceShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Note 2 - Investments (Details Textual)	May 25, 2018 shares	Jul. 10, 2017 shares	Sep. 30, 2018 shares	Jul. 09, 2017 shares
Windstream [Member]
Investment Owned, Balance, Shares	135		135
Frontier Communications [Member]
Investment Owned, Balance, Shares		300	300	4,508
Windstream [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	5
Frontier Communications [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		15